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(No Model.)

J. H. FISHER & G. 0. PEGK.

' LATHE FOR TURNING POLYGONAL BODIES. No. 256,991. Patented Apr.25,1882.

g5 y a UNrrnD STATES PATENT. OFFICE,

JOHN H. FISHER AND GASSIUS G. PECK, OF NEW YORK, N. Y.; SAID FISHERASSIGNOR TO SAID 'PEoK.

LATHE F-OR TURNING POLYG'ONAL BODIES.

SPECIFICATION forming part of Letters Patent No. 256,991, dated April25, 1882.

Application filed January 3, 1881. (N0 model.)

To all whom it may concern:

Be it known that we, JOHN H. FISHER and OAssIUs O. PEGK, of the city,county, and State of New York, have invented certain new and usefulImprovements i in ,Turning- Machines, of which the followingisaspecification.

Our invention relates to that class of turning-machines for shapingsquare or polygonal forms in which blanks of wood or other suitablematerial are arranged and secured in a circle concentric with thelathe-center, so that the cutting-tool in operation willact'successively upon one side of each piece or blank, removing materialtherefrom in'the are of a circle, governed by the radius of thecuttingedge from the lathe-center.

The object of our invention is to render the operation of placing andsecuring the blanks in position more convenient and effective thanheretofore, to adequately support and re-enforce the blanks against theaction of the cutting-tool, to adapt the apparatus to blanks ofdifferent length and thickness, and to provide for the placing andsecuring of two or more series or lengths of blanks in the machine atthe same timein proper relative position to be acted upon successively.

Our invention consists, first, in connection with a cylinder or drummounted concentrically upon a suitable shaft or adapted to be securedbetween the centers of alathe and formed with a shoulder or flange forthe reception of the ends of the blanks to be acted upon, and having oneor more adjustable flanges for securing the opposite ends of saidblanks, of a device forcing the adjustable flanges against the ends ofthe blanks, which is essentially a nutadjustable upon and engaging witha screwthread formed upon the periphery of the cylinder; secondly, informing the bearing-surfaces of one or both of the stationary or movableflanges with a series of in wardly-projectin g shoulders or offsets, soas to adapt the flanges to blanks of different thickness and effectuallywedge the ends of the blanks down against the periphery of the cylinderand prevent their withdrawal or displacement from any cause except theloosening of the tightening device; and, lastly, in the employment of anintermediate double-faced flange sliding upon the body of the cylinder,and adapted to receive and engage the adjoining ends of two seriesofblanks, when, owing to their shortness or for other cause, it isdesirable to secure more than one series in the apparatus.

In the accompanying drawings, Figure l is a side elevation, partly insection, of our improved construction, showing portionsof the flangesbroken away. Fig. 2 is a transverse section on the plane of line mm,Fig; 1, Fig. 3 is a detail section ofa flange, showing a modification inits bearing-surface.

The hub of the cylinder A may be adapted either to be secured upon ashaft suitablysupported and provided with a power-pulley, d, as shown inthe drawings, or to be secured between the ordinary centers of a lathe.

At one extremity the cylinder is provided with a'flange, a, againstwhich the ends of the blanks abut. One or more movable flanges, a a,slide longitudinally upon the body of the cylinder, and are preventedfrom turning laterally thereon by a feather or projection, a, on thecylinder engaging corresponding grooves or recesses in the flanges, orvice versa'. By thus insuring the alignment of the flanges all danger oftwisting the blanks out of their proper position during the operation ofsecuring them is avoided. If only one circle or series of blanks are tobe secured on the cylinder, a single movable flangeaing, a, issufficient, and is provided with a bearing-surface, f, for the blanksupon its side facing the stationary flange aand adapted upon its otherside to be acted upon by the adjusting and securing ring or nut c, whichlatter is formed with a female screwthread, engaging with acorresponding male thread, 0, out upon the periphery of the cylinder.

The nut c is provided with sockets c for the reception of the ends oflevers, or with radial spokes or other suitable devices by which it thesame time, an intermediate ring or sliding flange, a (or more, ifrequired,) is interposed between the fixed flange a and theadjustingflange a, against which thelocking-nutc bears. The intermediatering is formed with two bearing-surfaces for the reception and retentionof the adjacent ends of the two series of blanks, respectively.

The bearing-surfaces f of the flanges may be of any required form; butwe prefer to bevel them inward, so that their action, when the flangesare driven against the ends of the blanks, will be to wedge the latterdown firmly against the periphery ofthe cylinder. By thus beveling thebear-in gs we are enabled to compensate for any slight variations in thelength or thickness of the blanks Where the latter are wood or othercompressible material.

In some cases it may be desirable to proi'ide the bearing-surfaces ofthe flanges with one or more annular shoulders or offsets, as shown at9, Figs. 1 and 8, in which case the shoulders a are in a plane at rightangles to the axis of the cylinder, and are intended to receive andsupport'the end surfaces of the blanks, while the inclinedbearing-surfaces c act upon the outer surfaces of the blanks to wedgethe latter down against the cylinder. By having a series of offsets, asshown in Fig. 3, this form of flange is adapted to various thicknessesof blanks.

It will be seen that the cylinder not only effectually re-enforces theblanks against the pressure exerted by the cutting-tool, but also, byfurnishing support for the intermediate flange-rings, enables us tosecure two or more series of blanks in the machine at once.

What we claim, and desire to secure by Letters Patent, is

1. In combination with the cylinder A, fixed flange a, and one or moreintermediate adjust able flanges, a M, the tightening device consistingessentially of the nut a, engaging with the cylinder, for forcing saidmovable flanges and substantially in the manner specified.

2. In combination with the cylinder A, the flanges formed with a seriesof annular shoulders, a for the reception of the ends of the blanks, andthe inclined bearing-surfaces a for the purpose and substantially in themanner set forth.

3. In combination with the cylinder A, the flanges formed with theseries of annular shoulders a, for the reception of the ends of theblanks, substantially in the manner and for the purpose described.

4:. In combination with the cylinder A, provided with afixed flange, a,and an adjustable flange, 0., adapted to receive the thrust of thetightening device, the intermediate sliding flange, a, provided withbearingsurfaces on both sides for engaging the adjacent ends of twoseries of blanks, substantially in the manner and for the purposedescribed.

JOHN H. FISHER. OASSIUS C. PEOK. Witnesses GEO. W. MIATT, S. F.SULLIVAN.

toward the fixed shoulder a, for the purpose

